Gramophone



BUTLER. GRAMOPHONE.

APPLICATION FILED DEC. I6, l9l9.

Patented Mar. 7, 1922.

UNITED sures JOSEPH BUTLER, OF ALTRINCHAM, ENGLAND.

GRAMOPHONE.

Specification of Letters Patent.

Patented Mar. '7, 1922.

Application filed December 16, 1919. Serial No. 345,223.

To (2U ham it may concern:

Be it known that I. Josnrrr BUTLER, a subject of the King of Great Britain and Ireland, residing at 105 George Street, Altrincham, in the county of Chester, England, have invented new and useful Improvements in Gramophones, of which the following is a specification.

My invention has reference to fittings for talking machines or grainophones of the hornless or internal horn type, by means of which such machines can be easily converted for use with an external horn or trumpet.

For this purpose, I provide the tone arm with a barrel one end of which is blocked up. The barrel is supported by an upper and lower ring of metal secured together by arms. The tone arm and barrel are made reversible or adapted to use the same as desired either with the internal horn or with an external trumpet, and a fitting for an external horn is provided.

In the accompanying drawings.

Figs. 1 and 2 show in outside elevation and sectional elevation respectively the fitting as adapted for use with the internal horn of the instrument.

Fig. 3 shows the same fitting adapted for use with an external horn.

In carrying the invention into effect I form the tone arm 6 with a barrel 7" forming with said tone arm a T-shaped tubular member and this barrel 7 is provided at one end with a plug of wood or the like 9 which may be mounted in a thirnble l1 adapted to screw into either the top or the bottom of the tone arm barrel as required, or such plug may take the form of a curved diaphragm of thin metal or material permanently secured into one end of the barrel 7, see the dotted lines To support the barrel of the tone arm. I provide an upper and lower ring it of metal connected together by one. two, or more arms m. The lower ring 70 is screwed upon a ring a which forms part of or is screwed or secured to the flanged ring 6 attached to the table a of the gramophone communicating with the internal horn by the aperture (Z. The upper ring I: has screwed into it a bushing 0 which serves also to carry the trumpet holder such as j shown in Fig. 3, or a plug cap 64 when the internal horn is being used, as in the arrangement shown in Fig. 2. The

barrel f of the tone arm 6 is supported by and is rotatable upon the bottom ring is and 1s also inserted within the top ring Z; and against the end of the bushing 0.

As illustrated in Figs. 1 and 2, the appliance is adapted for use with the internal horn of the instrument.

When it is desired to change from the use of the internal horn to an external horn, the barrel is removed from its position be tween the rings is and reversed, that is to say, the end which is uppermost in Fig. .2 1s turned so as to become lowermost, as shown in Fig. 3. To enable this to be done, the barrel is, made to fit rather loosely so that by slightly unscrewing the bushing 0 it can be manipulated out of the rings is, reversed and replaced. lVhen this is done, in order to use the external horn, all that is necessary is to remove the cap a from the bushing 0 and substitute therefor the horn carrier 7'. This is what has been done in Fig 3. Instead of this reversal, however, the barrel f might be removed from the support 111g rings 70, and the thimble 71. carrying the plug g unscrewed from its position shown in Fig. 2, reversed and screwed into the position shown in Fig. 3. i

I declare that what I claim is.

1. In a talking machine having an internal horn, a tone arm provided with a transverse communicating barrel interiorly threaded at its opposite ends, a plughaving an exteriorly threaded portion for closing either end of said barrel, means for supporting said barrel with either end adjacent to said internal horn, and an exteriorly threaded member carried by. said supporting means for the attachment thereto of interchangeable end closing and horn attaching members.

2. In a talking machine having a tone arm provided with a tranwerse barrel. means for pivotally and reversibly supporting said barrel and comprising a pair of rings, a plurality of arms connecting said rings together, means carried by the machine for securing one of said rings thereto, and means carried by the other ring for the reception of interchangeable end closing and horn attaching members.

3. In a talking machine having an internal horn, a tone arm provided with an integral head forming therewith a T-shaped remo vablc' tubular member, means for supporting said head in alignment with said internal horn, a removable member carried within said head and adapted to be supported at either end thereof, said member when supported at one end of the head deflecting the sound from the tone arm through said internal horn and when at the opposite end of the head deflecting the sound away from the tone arm. n

In testimony whereof I have signed my name to this specification.

JOSEPH BUTLER. 

